Critical and emerging technologies are the new frontier for India-US cooperation as technologies have gained strategic significance, a former Obama administration official from the Silicon Valley has said ahead of Prime Minister Narendra Modi's visit to the US later this month. Arun M Kumar, former assistant secretary of commerce for global markets and director general of the US and foreign commercial service, said India has emerged as a very strong and trusted location with a deep capability to be able to take up a number of areas that have formally been concentrated in China. "A key area that is emerging…